mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-28 12:25:19 +01:00
236 lines
7.5 KiB
C
236 lines
7.5 KiB
C
/** @file
|
|
Block IO protocol as defined in the UEFI 2.0 specification.
|
|
|
|
The Block IO protocol is used to abstract block devices like hard drives,
|
|
DVD-ROMs and floppy drives.
|
|
|
|
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef __BLOCK_IO_H__
|
|
#define __BLOCK_IO_H__
|
|
|
|
#define EFI_BLOCK_IO_PROTOCOL_GUID \
|
|
{ \
|
|
0x964e5b21, 0x6459, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
|
|
}
|
|
|
|
typedef struct _EFI_BLOCK_IO_PROTOCOL EFI_BLOCK_IO_PROTOCOL;
|
|
|
|
///
|
|
/// Protocol GUID name defined in EFI1.1.
|
|
///
|
|
#define BLOCK_IO_PROTOCOL EFI_BLOCK_IO_PROTOCOL_GUID
|
|
|
|
///
|
|
/// Protocol defined in EFI1.1.
|
|
///
|
|
typedef EFI_BLOCK_IO_PROTOCOL EFI_BLOCK_IO;
|
|
|
|
/**
|
|
Reset the Block Device.
|
|
|
|
@param This Indicates a pointer to the calling context.
|
|
@param ExtendedVerification Driver may perform diagnostics on reset.
|
|
|
|
@retval EFI_SUCCESS The device was reset.
|
|
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
|
|
not be reset.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_RESET)(
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN BOOLEAN ExtendedVerification
|
|
);
|
|
|
|
/**
|
|
Read BufferSize bytes from Lba into Buffer.
|
|
|
|
@param This Indicates a pointer to the calling context.
|
|
@param MediaId Id of the media, changes every time the media is replaced.
|
|
@param Lba The starting Logical Block Address to read from
|
|
@param BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param Buffer A pointer to the destination buffer for the data. The caller is
|
|
responsible for either having implicit or explicit ownership of the buffer.
|
|
|
|
@retval EFI_SUCCESS The data was read correctly from the device.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing the read.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
|
|
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
|
|
or the buffer is not on proper alignment.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_READ)(
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA Lba,
|
|
IN UINTN BufferSize,
|
|
OUT VOID *Buffer
|
|
);
|
|
|
|
/**
|
|
Write BufferSize bytes from Lba into Buffer.
|
|
|
|
@param This Indicates a pointer to the calling context.
|
|
@param MediaId The media ID that the write request is for.
|
|
@param Lba The starting logical block address to be written. The caller is
|
|
responsible for writing to only legitimate locations.
|
|
@param BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param Buffer A pointer to the source buffer for the data.
|
|
|
|
@retval EFI_SUCCESS The data was written correctly to the device.
|
|
@retval EFI_WRITE_PROTECTED The device can not be written to.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
|
|
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
|
|
or the buffer is not on proper alignment.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_WRITE)(
|
|
IN EFI_BLOCK_IO_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA Lba,
|
|
IN UINTN BufferSize,
|
|
IN VOID *Buffer
|
|
);
|
|
|
|
/**
|
|
Flush the Block Device.
|
|
|
|
@param This Indicates a pointer to the calling context.
|
|
|
|
@retval EFI_SUCCESS All outstanding data was written to the device
|
|
@retval EFI_DEVICE_ERROR The device reported an error while writting back the data
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_FLUSH)(
|
|
IN EFI_BLOCK_IO_PROTOCOL *This
|
|
);
|
|
|
|
/**
|
|
Block IO read only mode data and updated only via members of BlockIO
|
|
**/
|
|
typedef struct {
|
|
///
|
|
/// The curent media Id. If the media changes, this value is changed.
|
|
///
|
|
UINT32 MediaId;
|
|
|
|
///
|
|
/// TRUE if the media is removable; otherwise, FALSE.
|
|
///
|
|
BOOLEAN RemovableMedia;
|
|
|
|
///
|
|
/// TRUE if there is a media currently present in the device;
|
|
/// othersise, FALSE. THis field shows the media present status
|
|
/// as of the most recent ReadBlocks() or WriteBlocks() call.
|
|
///
|
|
BOOLEAN MediaPresent;
|
|
|
|
///
|
|
/// TRUE if LBA 0 is the first block of a partition; otherwise
|
|
/// FALSE. For media with only one partition this would be TRUE.
|
|
///
|
|
BOOLEAN LogicalPartition;
|
|
|
|
///
|
|
/// TRUE if the media is marked read-only otherwise, FALSE.
|
|
/// This field shows the read-only status as of the most recent WriteBlocks () call.
|
|
///
|
|
BOOLEAN ReadOnly;
|
|
|
|
///
|
|
/// TRUE if the WriteBlock () function caches write data.
|
|
///
|
|
BOOLEAN WriteCaching;
|
|
|
|
///
|
|
/// The intrinsic block size of the device. If the media changes, then
|
|
/// this field is updated.
|
|
///
|
|
UINT32 BlockSize;
|
|
|
|
///
|
|
/// Supplies the alignment requirement for any buffer to read or write block(s).
|
|
///
|
|
UINT32 IoAlign;
|
|
|
|
///
|
|
/// The last logical block address on the device.
|
|
/// If the media changes, then this field is updated.
|
|
///
|
|
EFI_LBA LastBlock;
|
|
|
|
///
|
|
/// Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to
|
|
/// EFI_BLOCK_IO_PROTOCOL_REVISION2. Returns the first LBA is aligned to
|
|
/// a physical block boundary.
|
|
///
|
|
EFI_LBA LowestAlignedLba;
|
|
|
|
///
|
|
/// Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to
|
|
/// EFI_BLOCK_IO_PROTOCOL_REVISION2. Returns the number of logical blocks
|
|
/// per physical block.
|
|
///
|
|
UINT32 LogicalBlocksPerPhysicalBlock;
|
|
|
|
///
|
|
/// Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to
|
|
/// EFI_BLOCK_IO_PROTOCOL_REVISION3. Returns the optimal transfer length
|
|
/// granularity as a number of logical blocks.
|
|
///
|
|
UINT32 OptimalTransferLengthGranularity;
|
|
} EFI_BLOCK_IO_MEDIA;
|
|
|
|
#define EFI_BLOCK_IO_PROTOCOL_REVISION 0x00010000
|
|
#define EFI_BLOCK_IO_PROTOCOL_REVISION2 0x00020001
|
|
#define EFI_BLOCK_IO_PROTOCOL_REVISION3 0x00020031
|
|
|
|
///
|
|
/// Revision defined in EFI1.1.
|
|
///
|
|
#define EFI_BLOCK_IO_INTERFACE_REVISION EFI_BLOCK_IO_PROTOCOL_REVISION
|
|
|
|
///
|
|
/// This protocol provides control over block devices.
|
|
///
|
|
struct _EFI_BLOCK_IO_PROTOCOL {
|
|
///
|
|
/// The revision to which the block IO interface adheres. All future
|
|
/// revisions must be backwards compatible. If a future version is not
|
|
/// back wards compatible, it is not the same GUID.
|
|
///
|
|
UINT64 Revision;
|
|
///
|
|
/// Pointer to the EFI_BLOCK_IO_MEDIA data for this device.
|
|
///
|
|
EFI_BLOCK_IO_MEDIA *Media;
|
|
|
|
EFI_BLOCK_RESET Reset;
|
|
EFI_BLOCK_READ ReadBlocks;
|
|
EFI_BLOCK_WRITE WriteBlocks;
|
|
EFI_BLOCK_FLUSH FlushBlocks;
|
|
|
|
};
|
|
|
|
extern EFI_GUID gEfiBlockIoProtocolGuid;
|
|
|
|
#endif
|